Jobs Fullstack

Position Overview

As a Middle FullStack .NET Engineer, you will contribute to the development and enhancement of a healthcare platform that supports multiple medical registries and clinical data collection processes. The platform is designed for individual and group medical practices and focuses on managing Case Report Forms (CRFs), ensuring data quality, security, and regulatory compliance.
 

In this role, you will work across both backend and frontend development, building scalable web applications using .NET 10, SQL Server, Salesforce integrations, and modern AWS cloud services. You will collaborate closely with the Product Owner, Team Lead, QA, and fellow developers to deliver reliable solutions, resolve complex technical challenges, and contribute to the continuous evolution of the platform.

This position is ideal for an engineer who enjoys FullStack development, takes ownership of technical solutions, and is comfortable working in a modern cloud-based environment with a strong focus on software quality and maintainability.

Your Background

• 3+ years of commercial experience in software development
• Strong hands-on experience with .NET and C#
• Experience working with Salesforce and SOQL
• Good understanding of web application architecture, REST APIs, microservices, and asynchronous processing
• Solid knowledge of software design principles and clean coding practices (SOLID, Clean Code, YAGNI)
• Experience with SQL Server and Entity Framework Core
• Readiness to work on both backend and frontend tasks
• Experience with DynamoDB or other NoSQL databases
• Ability to analyze, estimate, and deliver complex technical tasks
• Strong problem-solving and debugging skills
• English level: Intermediate (B1+) or higher
   

Responsibilities

• Develop and maintain new features for both backend and frontend components of the platform
• Build and support REST APIs and integrations with Salesforce services
• Troubleshoot and resolve technical issues in a timely manner
• Participate in technical investigations and propose effective solutions
• Collaborate with Product Owner, QA, and development team during planning and delivery activities
• Contribute to architectural discussions and engineering best practices
• Write clean, maintainable, and testable code
• Participate in code reviews and knowledge sharing within the team
   

Technologies

.NET 10, ASP.NET Core, C#, SQL Server, Entity Framework Core, Salesforce, SOQL, DynamoDB, AWS Lambda, API Gateway, Cognito, SNS, Secrets Manager, CloudWatch, GitHub Actions, AWS SAM, CloudFormation, xUnit, Moq, Swagger/OpenAPI, NSwag, Sentry, Dapper

We Offer

• 20 billable days off in the first year of cooperation, all next years — 25 billable days off
• Fair and competitive compensation
• Friendly team and enjoyable working environment
• Clearly described business processes that really work
• Regular company updates and Q&A sessions with management
• Flexible work schedule
• Remote work mode
• Ability to transfer unused vacation days to the next year

If you do NOT want to disappear inside a large company doing small, invisible tasks for months – surrounded by people who don’t care, buried in bureaucracy, time tracking, and performance reviews that lead nowhere – this role may be for you.
 

If you DO want to work somewhere your contribution counts, where you can grow fast and work on real problems that actually matter – keep reading.
 

What the work actually looks like

• Design, deploy, and manage AI agents that automate real workflows
• Ship internal tools, external tools, and small applications end-to-end
• Solve practical engineering problems fast — integrations, scripts, automations, backend logic

We care more about how you think than what you’ve already shipped.

You’ll likely fit this role if:

• You use AI tools naturally as part of how you work
• You scope problems before writing code — and know what to skip
• You notice details others miss
• You’re honest about what you don’t know, and quick to figure it out
• You’ve built something recently, even if it was small

What we don’t care about

• Your years of experience
• Whether you’ve worked at a well-known company
• A perfect CV

Stack

We use what fits the problem. You should be comfortable with JavaScript, basic deployment, and working directly with APIs and LLM-based tools.

Our hiring process

• Short assessment (~45 min)
• Interview with the founder
• If it clicks, we move fast

Short assessment

We use a testgorilla for our short assessment. No trick questions. No algorithm puzzles. Just practical scenarios that reflect what the job actually looks like.

If you do NOT want to disappear inside a large company doing small, invisible tasks for months – surrounded by people who don’t care, buried in bureaucracy, time tracking, and performance reviews that lead nowhere – this role may be for you.
 

If you DO want to work somewhere your contribution counts, where you can grow fast and work on real problems that actually matter – keep reading.
 

What the work actually looks like

• Design, deploy, and manage AI agents that automate real workflows
• Ship internal tools, external tools, and small applications end-to-end
• Solve practical engineering problems fast — integrations, scripts, automations, backend logic

We care more about how you think than what you’ve already shipped.

You’ll likely fit this role if:

• You use AI tools naturally as part of how you work
• You scope problems before writing code — and know what to skip
• You notice details others miss
• You’re honest about what you don’t know, and quick to figure it out
• You’ve built something recently, even if it was small

What we don’t care about

• Your years of experience
• Whether you’ve worked at a well-known company
• A perfect CV

Stack

We use what fits the problem. You should be comfortable with Python, basic deployment, and working directly with APIs and LLM-based tools.

Our hiring process

• Short assessment (~45 min)
• Interview with the founder
• If it clicks, we move fast

Short assessment

We use a testgorilla for our short assessment. No trick questions. No algorithm puzzles. Just practical scenarios that reflect what the job actually looks like.

A potential invitation to potential minds!

4K-Soft is People. People are most important to us. People are at the heart of every connection we build. Come and join 4K-Soft, where human minds come together to pave the way for the future. We offer a variety of full-time jobs, training programs and internships. Only imagine, how you can help our company and start your career with 4K-Soft!

We are looking for a Junior FullStack Web Developer.

What we expect from you:

2+- years of commercial experience in Node.js + React.

We offer:

Competitive level of remuneration

Modern comfortable office or remote work

Convenient work schedule, paid vacation and sick leaves

The opportunity to grow professionally by participating in the implementation of interesting and complex projects, as well as showing personal initiative.

Requirements:

• 1–3 years of commercial development experience;
• Strong knowledge of JavaScript and TypeScript;
• Experience with Node.js and/or Bun.js;
• Experience with Vue.js is preferred; React is also acceptable;
• Good understanding of full-stack web application development;
• Understanding of WebSockets and real-time communication;
• Experience working with PostgreSQL;
• Good understanding of asynchronous programming;
• Confident working with the Git version control system;
• Strong analytical and problem-solving skills;
• Intermediate level of English.

Would be a plus:

• Experience with modern backend architecture and API design;
• Experience working with ORMs or query builders;
• Familiarity with deployment, CI/CD, and cloud environments;
• Experience building scalable products or SaaS platforms.
• Experience using AI tools for coding to improve productivity.

Responsibilities:

• Develop and maintain full-stack product features with attention to quality and performance;
• Participate in end-to-end development, from idea to production;
• Build both backend and frontend parts of the application;
• Work with real-time features using WebSockets;
• Deliver features quickly and efficiently.

Шукаємо Fullstack PHP Engineer для розвитку окремого SEO-напрямку.
Ми шукаємо інженера, який не просто пише backend, а розуміє, як технічні рішення впливають на SEO, індексацію та масштабування органічного трафіку.

Ти будеш працювати над SEO-проєктами, внутрішніми платформами, генераторами сторінок, адмінками та сервісами, які обробляють великі об’єми SEO-сторінок і трафіку.

Що потрібно робити

• Розробляти та підтримувати SEO-проєкти на PHP
• Створювати backend-логіку для генерації сторінок, шаблонів та метаданих
• Реалізовувати технічне SEO:
  • sitemap.xml
  • robots.txt
  • canonical
  • redirects
  • OpenGraph / Twitter Cards
  • schema.org
• Оптимізувати швидкість сайтів та Core Web Vitals
• Працювати з великою кількістю landing pages / programmatic SEO pages
• Розробляти внутрішні інструменти та адмінки для SEO-команди
• Інтегрувати сторонні API, аналітику та внутрішні сервіси
• Працювати з кешуванням, CDN, чергами та оптимізацією навантаження
• Використовувати AI-інструменти для прискорення розробки та прототипування

Наш стек

Backend

• PHP 8+
• MySQL / PostgreSQL
• Redis
• REST API
• Queues / Jobs / Workers
• Composer
• PHPUnit / Pest

Frontend

• Blade / Twig
• JavaScript / TypeScript
• Vue / React / Alpine.js
• Tailwind CSS / Bootstrap

SEO / Infra

• SSR (server-side rendering)
• sitemap.xml
• robots.txt
• canonical
• schema.org
• OpenGraph / Twitter Cards
• Core Web Vitals
• CDN

Tools

• Git
• Docker
• CI/CD
• Linux basics
• ChatGPT / Claude / Cursor / Copilot / Windsurf

Що очікуємо від кандидата

• 3+ роки комерційного досвіду у fullstack-розробці
• Впевнений досвід з PHP 8+
• Досвід роботи з REST API
• Практичний досвід з MySQL
• Розуміння кешування, CDN та оптимізації продуктивності
• Досвід з Blade/Twig та сучасним frontend
• Розуміння server-side rendering і його впливу на SEO
• Знання технічного SEO:
  • індексація
  • sitemap
  • robots.txt
  • canonical
  • redirects
  • SEO-friendly URLs
  • Core Web Vitals
• Досвід роботи з Git, CI/CD та code review
• Вміння писати підтримуваний та структурований код

AI-assisted development / vibe coding

Для нас AI — це частина сучасної розробки, а не просто «генератор коду».

Буде важливо, якщо ти:

• вмієш працювати з ChatGPT / Claude / Cursor / Copilot
• швидко прототипуєш рішення через AI
• перевіряєш та рефакториш AI-generated code
• використовуєш AI для:
  • boilerplate
  • тестів
  • рефакторингу
  • документації
  • аналізу помилок
  • SQL-запитів
  • роботи з legacy-кодом

Буде плюсом

• Досвід роботи з SEO-проєктами
• Affiliate / Gambling / Betting / Crypto / Leadgen ніші
• Programmatic SEO
• Multi-language / multi-region сайти
• WordPress / October CMS / Craft CMS
• Docker / базовий DevOps
• Google Search Console, Ahrefs, Lighthouse
• SQL optimization, caching, CDN, image optimization

Senior Full-Stack Developer – Healthcare Technology

Remote | Contract, Part-Time or Full-Time

We are a small healthcare technology startup building custom software platforms including EHR, patient management, healthcare operations, and AI-enabled applications.

We are looking for a senior full-stack developer who is comfortable working in a fast-paced startup environment and can independently take projects from concept to production.

Requirements

• Strong React / Next.js experience
• Strong Node.js / TypeScript experience
• SQL database experience
• AWS or GCP experience
• Experience with API integrations
• Experience using AI-assisted development tools such as Claude Code, Cursor, ChatGPT, or GitHub Copilot
• Ability to rapidly learn new technologies and solve unfamiliar problems
• Strong communication skills and ability to work directly with founders

Preferred

• Healthcare, HIPAA, EHR, or FHIR experience
• Experience designing application architecture
• Startup experience

What We Value

• Rapid development and execution
• Independent problem solving
• AI-first development workflows
• Pragmatic architecture decisions
• Continuous learning

Please include examples of projects you have built and describe how you use AI tools in your development process.

________________________________________________________

Senior Full-Stack Developer (Healthcare Tech)

Віддалено | Full-Time, Part-Time або Contract

Ми розробляємо власні медичні програмні продукти: EHR, системи управління пацієнтами, автоматизацію бізнес-процесів та AI-рішення для сфери охорони здоров'я.

Шукаємо досвідченого Full-Stack розробника, який може самостійно вирішувати складні задачі та швидко створювати продукти від ідеї до запуску.

Вимоги

• React / Next.js
• Node.js / TypeScript
• SQL
• AWS або GCP
• API інтеграції
• Досвід роботи з Claude Code, Cursor, ChatGPT, GitHub Copilot або іншими AI-інструментами
• Вміння швидко вивчати нові технології
• Самостійність та відповідальність

Буде плюсом

• Healthcare, HIPAA, EHR або FHIR
• Проєктування архітектури систем
• Досвід роботи в стартапах

Ми цінуємо

• Швидкість розробки
• AI-first підхід
• Практичне вирішення задач
• Ініціативність та постійне навчання

У відгуку коротко опишіть свої найкращі проєкти та як ви використовуєте AI у щоденній роботі.

Full-Stack Developer (AI-Assisted Development)

Remote | Full-Time, Part-Time, or Contract

We are a healthcare technology startup building custom software including EHR systems, patient management platforms, websites, business automation tools, and AI-enabled applications.

We are looking for a Full-Stack Developer who enjoys solving real-world problems, learning new technologies, and building products quickly using modern AI-assisted development tools.

Requirements

• 2+ years of software development experience
• React / Next.js
• Node.js / TypeScript
• SQL databases
• API integrations
• At least 1 year of regular use of Claude Code, Cursor, ChatGPT, GitHub Copilot, or similar AI development tools
• Ability to work independently and learn quickly

Nice to Have

• Healthcare, EHR, HIPAA, or FHIR experience
• AWS or GCP experience
• Startup experience

We Value

• AI-first development
• Rapid prototyping and delivery
• Independent problem solving
• Continuous learning

To Apply

Please include:

1. Your expected hourly rate or salary.
2. Your availability (full-time, part-time, or contract).
3. A brief description of your AI development workflow.
4. An example of a project you built and the role AI tools played in the process.

______________________________________________

Full-Stack Developer (AI-Assisted Development)

Віддалено | Full-Time, Part-Time або Contract

Ми — стартап у сфері медичних технологій, який розробляє власні EHR-системи, платформи управління пацієнтами, веб-застосунки, інструменти автоматизації бізнес-процесів та AI-рішення.

Шукаємо Full-Stack розробника, який любить вирішувати складні задачі, швидко освоює нові технології та активно використовує AI-інструменти у щоденній роботі.

Вимоги

• 2+ роки досвіду комерційної розробки
• React / Next.js
• Node.js / TypeScript
• SQL бази даних
• Досвід роботи з API
• Мінімум 1 рік активного використання Claude Code, Cursor, ChatGPT, GitHub Copilot або подібних AI-інструментів
• Самостійність та здатність швидко навчатися

Буде плюсом

• Досвід у Healthcare, EHR, HIPAA або FHIR
• AWS або GCP
• Досвід роботи у стартапах

Ми цінуємо

• AI-first підхід до розробки
• Швидку реалізацію продуктів
• Самостійне вирішення задач
• Постійний розвиток та навчання

Для відгуку вкажіть

1. Вашу бажану погодинну ставку або компенсацію.
2. Формат роботи (Full-Time, Part-Time або Contract).
3. Коротко опишіть свій AI workflow.
4. Приклад проєкту, який ви створили, та як використовували AI у процесі розробки.

We are seeking a Full-Stack Web Developer who is motivated by building high-quality web platforms and integrations. You will play a key role in the evolution and modernization of an existing web platform to support future growth, advanced integrations, and evolving business requirements.
This role is ideal for someone with experience working on platform migrations, architecture redesign, and multi-system integrations within production environments. 

Responsibilities
•    Design, develop, and maintain modern web platform components.
•    Connect web apps to RESTful APIs and back-end services.
•    Contribute to the modernization of existing components.
•    Integrate with internal services, partner platforms, and third-party APIs. 
•    Develop responsive, high-performance front-end components using modern web technologies. 
•    Collaborate on back-end services to support required functionality.
•    Ensure platform reliability, scalability, and maintainability across all environments. 
•    Conduct testing, troubleshooting, debugging, and performance optimization. 
•    Collaborate with product, operations, and technical teams.
•    Maintain technical documentation for systems, integrations, deployment processes, and architecture decisions. 

Required Skills & Experience
•    Bachelor’s degree in Computer Science, Software Engineering, Information Technology, or a related field. 
•    Strong experience in full-stack web development with reusable front-end components.
•    Experience building responsive, high-performance user interfaces using component-based front-end architectures.
•    3+ years of experience in front-end development using modern web technologies including TypeScript, React, and/or Next.js.
•    Familiarity with back-end development and Node.js-based APIs.
•    Experience consuming REST APIs with client-side caching.
•    Experience with Git and standard CI/CD workflows. 
•    Strong problem-solving abilities and a structured approach to debugging and troubleshooting. 
•    Ability to work independently as well as effectively collaborate within a team. 
•    Strong self-learning skills and willingness to stay current with modern technologies and best practices. 

Nice to Have / Preferred Qualifications
•    Experience participating in platform modernization, system redesign, or large-scale web development projects. 
•    Experience with automated testing practices (unit, integration, or end-to-end testing) in modern web applications.
•    Experience working with mock data, API stubs, or contract-driven development to build features independently of backend availability.
•    Experience with performance optimization and profiling of web applications and APIs.
•    Experience designing systems intended for future integrations and long-term scalability. 
•    Understanding of DevOps principles and infrastructure automation.

Probation period: 3 months

Work equipment: Yes

We're looking for an experienced Senior Full-Stack Engineer to join a growing team building data-driven products at scale. This role combines backend development, modern frontend engineering, and data platform expertise, with a strong focus on Databricks, Python, and TypeScript.

You'll work on systems that help organizations collect, process, analyze, and visualize large volumes of data, while contributing to technical architecture and product development decisions.

What You'll Do

• Develop and enhance scalable data solutions using Databricks
• Build reliable backend services, APIs, and integrations with Python
• Create intuitive, high-performance web applications using TypeScript and React
• Design internal tools, dashboards, and workflow management interfaces
• Partner with product, design, and engineering teams to deliver new features
• Improve system performance, scalability, and maintainability
• Participate in technical planning, architecture discussions, and code reviews
• Ensure code quality through testing, documentation, and engineering best practices

What We're Looking For

Required

• 7+ years of professional software engineering experience
• Commercial experience working with Databricks in production environments
• Strong backend development experience with Python
• Strong frontend development experience with TypeScript
• Experience building applications with React or similar modern frameworks
• Experience developing data platforms, analytics solutions, or ETL/ELT systems
• Strong SQL skills and experience working with large datasets
• Experience designing and consuming RESTful APIs
• Familiarity with cloud environments such as AWS, Azure, or GCP
• Experience working on distributed or data-intensive systems
• English proficiency at C1 level or higher
• Russian proficiency at C1 level or higher

Nice to Have

• Experience with Apache Spark and Delta Lake
• Experience with Airflow, Kafka, or related data engineering technologies
• Background building enterprise SaaS products
• Knowledge of modern data warehousing and analytics architectures

Contract Details

• Full-time engagement (8 hours per day)
• Long-term B2B contractor agreement
• Competitive monthly compensation
• Payments made to your registered business entity (FOP / Sole Proprietor / equivalent)
• Contractor is responsible for local taxes and compliance requirements
• Open-ended cooperation
• 30-day notice period for either party

Fullstack Engineer — Automateco

We're a technical agency powering the largest Amazon marketing operation in the United States. Our platform, Signal, is a full-stack intelligence product that surfaces Amazon SEO and performance data for some of the biggest brands in e-commerce — and we're rebuilding it from the ground up with modern tooling and AI at the center.

This is a full-time, fully remote role with exclusive dedication to Automateco. You'll work directly alongside the founding team to migrate a production Laravel + React platform to a modern TypeScript/Node.js/React stack, while layering in AI-driven features that change how our clients understand and act on their data.

What You'll Do

- Own and ship features across the full stack — React frontend, Node.js API layer, and data pipelines
- Lead the migration from a Laravel + React monolith to a TypeScript/Node.js + React architecture
- Build and integrate AI-driven features: intelligent recommendations, automated analysis, and agent-assisted workflows
- Design clean, scalable REST APIs and integrate with third-party data sources (Amazon Advertising, Snowflake, and others)
- Work in fast weekly sprints with a small, senior team — you'll see your work in production quickly
- Deploy and monitor applications on cloud infrastructure; own your services end to end
- Contribute to AI agent architecture decisions as we expand autonomous workflows into the product
- Evaluate and adopt emerging AI tooling to accelerate both the product and our own development process
 

You Bring

- Strong, production-tested experience with TypeScript, React, and Node.js
- Solid grasp of backend architecture: API design, data modeling, auth patterns, performance
- Experience with or genuine curiosity about AI development — LLM integrations, agent frameworks, or AI-assisted workflows
- Comfort migrating legacy systems without breaking production — you think in increments, not rewrites
- Hands-on familiarity with relational databases and data-heavy applications
- A pragmatic mindset: you pick the right tool for the job and don't over-engineer
- Strong debugging instincts and a bias toward clean, maintainable code
- Ability to work independently and communicate clearly in a remote, async-first environment

Nice to Have

- Experience with Laravel or PHP — understanding the system you're migrating from is a real advantage
- Prior work with Amazon Advertising APIs, Snowflake, or e-commerce data pipelines
- Hands-on experience with AI platforms, automation tools (n8n, Make, Zapier), or agent frameworks
- Familiarity with React Query, tRPC, Prisma, or similar modern Node.js stack tooling

Interview Process

- Code review screen (20 min)
- Technical interview with an engineer
- Interview with the founding team
- Offer

Important: We expect AI tools to be part of your daily workflow. Candidates who primarily rely on traditional development approaches and do not actively use modern AI coding tools are unlikely to be a good fit for this role.

Are you an AI-driven Full Stack Engineer who uses modern AI tools to build faster, ship faster, and solve complex problems more efficiently?
 

At GT Protocol, we're not looking for traditional developers. We're building an AI-first engineering culture where AI is deeply integrated into the development workflow — from architecture and coding to testing, debugging, research, and product delivery.
 

We are looking for a Senior Full Stack Engineer who embraces AI-assisted development and understands how to leverage modern AI tools to maximize productivity and focus on solving real business problems rather than spending time on repetitive tasks.
 

About the Role

You will be working on GT Protocol's AI-powered trading and investment platform, helping build products used by thousands of users across Web3, CeFi, and DeFi ecosystems.
 

This role combines backend development, frontend development, AI integrations, trading infrastructure, blockchain analytics, real-time systems, and modern AI-driven engineering practices.
 

You will participate in designing and building scalable products while actively utilizing AI development tools as part of your daily workflow.
 

What We Expect from an AI-Driven Engineer

• Comfortable using AI coding assistants as a core part of the development process
• Experience working with tools such as Cursor, Claude Code, ChatGPT, Gemini, Copilot, Windsurf, or similar solutions
• Ability to effectively use AI for coding, architecture exploration, debugging, code reviews, documentation, testing, and research
• Strong focus on shipping results rather than maximizing manual coding hours
• Curiosity and willingness to continuously adapt to new AI-driven development workflows
• Understanding that AI is a productivity multiplier, not a replacement for engineering fundamentals
   

We believe the future belongs to engineers who can combine strong technical skills with the ability to leverage AI effectively. Our goal is to build a team that operates significantly faster than traditional software teams while maintaining high engineering standards.
 

Responsibilities and Duties

• Participate in the design, development, and maintenance of a sophisticated AI-powered trading platform serving thousands of users worldwide
• Develop and maintain backend services using Python, FastAPI, PostgreSQL, MongoDB, and Redis
• Build modern frontend applications using React, Next.js, TypeScript, and Tailwind
• Integrate centralized and decentralized exchanges, blockchain networks, and third-party APIs
• Design and implement real-time systems using WebSockets, Socket.IO, asyncio, and event-driven architectures
• Develop AI-powered features, portfolio analytics, trading automation, and market intelligence tools
• Build and maintain Telegram-based products and AI assistants
• Collaborate closely with Product Managers, Designers, AI Engineers, and other Developers
• Participate in architectural decisions, code reviews, and continuous platform improvements
• Ensure high performance, scalability, and security across all platform components
   

Work Experience

• 4+ years of commercial software development experience
• Experience building production-grade web applications and APIs
• Experience working with cryptocurrency, trading, fintech, Web3, or blockchain products
• Experience working in distributed remote teams
• Bachelor's degree will be a plus
   

Required Skills

• Strong Python knowledge, FastAPI, asyncio, aiohttp, websockets, SQLAlchemy 2.x (async), PostgreSQL, MongoDB, Redis
• JavaScript, TypeScript, React 18+, Next.js, Redux / Redux-Saga, Tailwind CSS
• Docker, Docker Swarm, Linux, Git
• JWT, RBAC, bcrypt, OTP authentication flows
• aiogram 3, CCXT, web3.py, Solana SDK, Alchemy, CoinGecko, GeckoTerminal APIs
• Cursor, Claude Code, ChatGPT, Gemini, Copilot, Windsurf, or similar
• Experience integrating external APIs
• Understanding of scalable distributed systems
• Experience with real-time applications
   

Will Be a Plus

• Personal projects
• English – B2+
   

About GT Protocol

GT Protocol (Global Trading Artificial Intelligence) is an AI-powered crypto trading ecosystem founded in 2021 and the ultimate AI infrastructure for trading.

GT Protocol enables users to build, backtest, optimize, launch, and execute trading strategies using fully automated AI-driven bots across centralized and decentralized crypto markets (CEX and DEX). Its products provide AI-powered infrastructure for strategy creation, optimization, backtesting, and automated execution across the crypto trading ecosystem.
 

Why GT Protocol?

— Over 100,000 users worldwide trust our products.

— Our platform combines AI, blockchain, trading infrastructure, and Web3 technologies into a single ecosystem.

— We process millions of market data events and integrate with major exchanges and blockchain networks.

— Our team includes experts from Europe, Asia, and the United States working remotely and collaboratively across multiple time zones.

— GT Protocol is backed by industry-leading investors and partners, including BNB Chain, Animoca Brands, ChainGPT, DAO Maker, CoinPayments, and others.

— We are regularly featured by major crypto and technology media and participate in leading blockchain conferences worldwide.

— You'll work on products at the intersection of AI, fintech, trading, and Web3 while helping shape the future architecture of the platform.

Currently, our team consists of talented professionals located across multiple countries. Our main office is based in Odessa, Ukraine; however, many team members work remotely worldwide.

Join something big — be a part of GT Protocol and help build the future of AI-powered investing.

Senior Fullstack JavaScript / TypeScript Engineer (React / Next.js / Node.js)

We are looking for a strong Fullstack JavaScript / TypeScript Engineer who wants to work on modern web applications, scalable frontend/backend systems, and real product challenges.

This role is for an engineer who:

• is confident working across both frontend and backend,
• understands the modern React ecosystem,
• can make independent technical decisions,
• knows how to build maintainable architecture,
• and wants to influence the product instead of simply completing tasks.

Responsibilities

• Develop and maintain frontend applications using React / Next.js
• Develop backend services using Node.js
• Work with TypeScript across the entire stack
• Build scalable and maintainable application architecture
• Integrate frontend applications with backend APIs
• Work with asynchronous workflows and modern state management
• Optimize frontend and backend performance
• Implement authentication and authorization flows
• Participate in technical and architectural decision-making
• Work with cloud services and deployment workflows
• Integrate AI-powered features or external AI services into products
• Collaborate with product teams and designers
• Write clean, maintainable, production-ready code

Requirements

Must-have:

• 4+ years of experience in JavaScript / TypeScript development
• Strong production experience with React
• Experience with Next.js
• Backend development experience with Node.js
• Solid TypeScript knowledge
• Understanding of modern frontend architecture
• REST API integration experience
• Experience with state management solutions
• HTML / CSS / responsive UI development
• Git workflows
• Understanding of web performance optimization
• Experience working with cloud environments
• Experience with AI integrations or external AI APIs is a plus
• English level sufficient for technical communication and documentation

Nice to have

• Fullstack architecture experience
• React performance optimization
• SSR / SSG / ISR experience in Next.js
• Experience with cloud platforms
• CI/CD workflows
• Docker
• Authentication / security best practices
• WebSocket / realtime application experience
• Experience building scalable frontend systems
• AI-assisted products or AI integrations
• Experience working closely with product teams
• Testing experience (unit / integration / e2e)

Who We Are Looking For

We are not looking for a “frontend-only developer.”

We are looking for a fullstack engineer who:

• understands the system as a whole,
• sees how frontend and backend interact,
• can independently own features,
• thinks about scalability and maintainability,
• and operates with senior-level engineering ownership.

Particularly valuable experience includes:

• building fullstack products,
• React + cloud knowledge,
• AI integrations,
• the ability to make technical decisions independently.

Tech Stack

• React
• Next.js
• Node.js
• TypeScript
• JavaScript
• REST APIs
• Git
• Cloud services
• Docker

Requirements:

• 1–3 years of commercial development experience;
• Strong knowledge of JavaScript and TypeScript;
• Experience with Node.js and/or Bun.js;
• Experience with Vue.js is preferred; React is also acceptable;
• Good understanding of full-stack web application development;
• Understanding of WebSockets and real-time communication;
• Experience working with PostgreSQL;
• Good understanding of asynchronous programming;
• Confident working with the Git version control system;
• Strong analytical and problem-solving skills;

• Intermediate level of English.

   

Would be a plus:

• Experience with modern backend architecture and API design;
• Experience working with ORMs or query builders;
• Familiarity with deployment, CI/CD, and cloud environments;
• Experience building scalable products or SaaS platforms.

• Experience using AI tools for coding to improve productivity;

   

Responsibilities:

• Develop and maintain full-stack product features with attention to quality and performance;
• Participate in end-to-end development, from idea to production;
• Build both backend and frontend parts of the application;
• Work with real-time features using WebSockets;
• Deliver features quickly and efficiently;

We are looking for a skilled project developer to develop the new version of our current NPS platform. This is a concrete, well-defined project where you take ownership of building the next generation of the system on a solid technical foundation.

A central element of the role is the active use of AI as a core part of the development workflow, including tools such as Claude Code. We expect you to already work AI-first — not just occasionally.

About our system
Relationwise is a SaaS platform for measuring and acting on customer and employee loyalty (NPS/eNPS). At its core it is a survey distribution engine combined with an analytics and reporting platform. The current solution covers, among other things:

• Survey design and configuration with multiple versions per language, region or business unit
• Distribution at scale over email and SMS (Twilio), with Excel-based recipient uploads, validation, scheduling, reminders and telephone follow-up
• A REST API with recipient endpoints, API-key authentication and automatic routing of recipients to the correct survey version; email delivery via SendGrid
• A loyalty dashboard with NPS score, Promoter/Passive/Detractor breakdown, historical trends, a Respondent Explorer with rich filtering and Excel export, plus benchmarking
• Score-based real-time alerts, weekly/monthly summary reports and fully templated notification emails
• Multi-tenant user and access management with per-user data access, roles and an audit log

The platform is built on C#/.NET and integrates with services such as SendGrid (email) and Twilio (SMS). The new system is to be built on Azure or an equivalent cloud platform.

Your primary responsibilities

• Developing the new version of our existing NPS system (C# / .Net / Azure)
• Using AI tools, including Claude Code, as an integrated part of your development work

• Close collaboration with our COO on direction, prioritization and progress

  
  Additional Info

• Fixed-term project position. If the project succeeds, a permanent position may follow.
• On-site at our office in Vejle, Denmark, working directly with our COO. Relocation to Vejle is required — this is not a remote role.

• To support your move, we help you find an apartment near the office and cover its cost for the duration of the project, and we support you through relocation and the work-permit process.

  
  Additional requirements

• Relocation to Vejle, Denmark is a must — you must be able and willing to move and work on-site.
• Ability to design and build the new system on Azure or an equivalent cloud platform
• A demonstrated ability to get high-quality results from AI tools through effective prompting, review and iteration
• At the interview, you will be asked to present examples of projects you have previously built with the help of AI
• As part of your application, please include an estimate of how long you expect it will take to develop the system